Path: utzoo!utgpu!watserv1!watmath!att!ucbvax!van-bc!rsoft!mindlink!a808
From: a808@mindlink.UUCP (David R. Matthews)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: A500 ---> A1000 serial
Message-ID: <1989@mindlink.UUCP>
Date: 2 Jun 90 17:20:49 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 4

If both machines want to talk to each other, then you will need pin 3 also.
pins 2 and 3 are the transmit and receive for both machines.
I think a good cable might be 2,3,6,7,20.
Good luck!